Weighing scale



FIG. 1 is a perspective view of a weighing scale showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right-side elevational view thereof, an elevational view of the left side being a mirror image;

FIG. 5 is a rear view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a perspective view of the weighing scale of FIG. 1, showing the head portion partially rotated upward.

The portions shown in dashed lines form no part of the claimed design. 

The ornamental design for a weighing scale, as shown and described. 